The panda's thumb

From the AP:

She was wearing gloves and feeding the panda bamboo on Tuesday morning when "suddenly, the panda bit into her thumb," Xinhua said.
"When she cried out, the cub became excited and gripped more tightly," it said. "Lisa finally managed to wrench herself free."
About 20 percent of the thumb had been bitten off, Xinhua said.

Don't feed the bears!